diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2017-09-25 15:05:38 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-27 10:23:16 +0200 |
| commit | 4516069f1b05d3e84f5e11a8490ee0ca09997731 (patch) | |
| tree | 5809b088bb985dbb4fa8d510bc9b2abfa81a2031 | |
| parent | 195674adee572b97761501f3906e4cc0e290891f (diff) | |
drm/nouveau/mmu: flush tlbs before deleting page tables
commit 77913bbcb43ac9a07a6fe849c2fd3bf85fc8bdd8 upstream.
Even though we've zeroed the PDE, the GPU may have cached the PD, so we
need to flush when deleting them.
Noticed while working on replacement MMU code, but a backport might be a
good idea, so let's fix it in the current code too.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c index e04a2296ecd0..5bb7f7e0f11f 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/base.c @@ -240,6 +240,8 @@ nvkm_vm_unmap_pgt(struct nvkm_vm *vm, int big, u32 fpde, u32 lpde) mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem); } + mmu->func->flush(vm); + nvkm_memory_del(&pgt); } } |